– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 10 pm Wed 09 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 10 pm Wed 09 Sep Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryLight rain (total 2mm), mostly falling on Sat afternoon. Very mild (max 18°C on Wed night, min 10°C on Thu night). Wind will be generally light. | Days 5–7 Weather SummaryMostly dry. Warm (max 22°C on Tue afternoon, min 10°C on Sat night). Wind will be generally light. | |||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | ||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  |  |  | | | | | | | | | | |
some clouds | rain shwrs | clear | some clouds | some clouds | light rain | rain shwrs | some clouds | light rain | rain shwrs | some clouds | rain shwrs | some clouds | rain shwrs | rain shwrs | some clouds | |
Cloud base (m) | 8850 | 800 | 1500 | 6150 | 850 | 900 | 3300 | 4650 | 1650 | 4900 | 700 | 800 | 900 | 800 | 950 | 6600 |
km/h | ||||||||||||||||
 |  |  |  |  |  | |||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | 0.1 | — | — | — | 0.1 | 0.5 | — | 1.3 | 0.3 | — | 0.2 | — | 0.1 | 0.2 | — |
max °C | 18 | 16 | 18 | 13 | 13 | 15 | 13 | 17 | 17 | 14 | 13 | 14 | 12 | 13 | 15 | 13 |
min °C | 14 | 14 | 18 | 10 | 11 | 14 | 12 | 13 | 16 | 10 | 11 | 13 | 10 | 11 | 14 | 12 |
chill °C | 14 | 14 | 18 | 10 | 11 | 14 | 12 | 13 | 16 | 10 | 11 | 13 | 10 | 11 | 14 | 12 |
Freezing level m | 3700 | 3200 | 3050 | 2550 | 2500 | 2700 | 2800 | 2800 | 2800 | 2750 | 2650 | 2550 | 2650 | 3200 | 3300 | 3250 |
 | — | 6:37 | — | — | 6:37 | — | — | 6:39 | — | — | 6:41 | — | — | 6:41 | — | — |
 | — | — | 7:30 | — | — | 7:29 | — | — | 7:27 | — | — | 7:24 | — | — | 7:22 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Light rain (total 2mm), mostly falling on Sat afternoon. Very mild (max 18°C on Wed night, min 10°C on Thu night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Mostly dry. Warm (max 22°C on Tue afternoon, min 10°C on Sat night). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.
| Weather Station | Temp. | Weather | Wind | Gusts | Cloud / Visibility |
|---|---|---|---|---|---|
Skagit Burlingto / t Vernon Airport |  | ||||
Bellingham Airport | | ||||
* NOTE: not all weather observatories update at the same frequency which is the reason why some locations may show data from stations that are further away than known closer ones.